Dual-task decrements in gait: contributing factors among healthy older adults.
Dual-task decrements in gait: contributing factors among healthy older adults.
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DOI：
10.1093/gerona/63.12.1335
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发表时间：
2008-12
期刊：
影响因子：
--
通讯作者：
Giladi N
中科院分区：
文献类型：
--
作者：
Hausdorff JM;Schweiger A;Herman T;Yogev-Seligmann G;Giladi N
当老年人步行同时执行其他任务时，导致双重任务（DT）表现变化的因素尚不清楚。我们假设认知和运动储备（例如，执行功能、EF、姿势控制和行走能力）和影响（例如，焦虑、抑郁症状）影响步态中的DT减少（DTDs）。228名社区生活的健康老年人（平均年龄：76.2±4.2岁; 59%为女性）在有和没有双重任务的情况下行走，例如，减7音素监测移动性（例如，动态步态指数），认知功能（例如，记忆，EF），和影响（例如，老年抑郁量表）进行量化。双变量和多变量分析确定了与DTD相关的因素，包括步态速度（运动功能的一般测量）、摆动时间（反映步态期间的平衡）和摆动时间变异性（步幅一致性的测量）。在所有DT期间，步态速度和摆动时间减少（p<0.001），摆动时间变异性增加（变得更糟）（p<0.001）。步态速度中的DTD与舒适行走步态速度相关，但与移动性或认知功能测试无关。挥杆时间变异性的DTD与EF、移动性和情感相关（例如，抑郁症状）。DTD中的大部分差异无法解释。步行能力和认知功能有助于DT对步态的影响，但这些关系取决于DT的具体情况，正在研究的步态特征，以及认知领域的具体情况。在双重任务的同时满足日常行走的挑战显然依赖于多种因素，包括一致的步态模式和EF。
The factors that contribute to the dual task (DT) changes in performance that occur when older adults walk while simultaneously performing other tasks are not well-known. We hypothesized that cognitive and motor reserve (e.g., executive function, EF, postural control, and walking abilities) and affect (e.g., anxiety, depressive symptoms) influence the DT decrements (DTDs) in gait. 228 community-living, healthy older adults (mean: 76.2±4.2 yrs; 59% women) walked with and without dual tasking, e.g., subtracting 7’s, phoneme monitoring. Mobility (e.g., the Dynamic Gait Index), cognitive function (e.g., memory, EF), and affect (e.g., Geriatric Depression Scale) were quantified. Bivariate and multivariate analyses identified factors associated with the DTD in gait speed (a general measure of locomotor function), swing time, (reflecting balance during gait), and swing time variability (a measure of stride-to-stride consistency). Gait speed and swing time decreased (p<0.001) and swing time variability increased (became worse) (p<0.001) during all DTs. The DTD in gait speed was correlated with comfortable-walking gait speed, but not with tests of mobility or cognitive function. The DTD in swing time variability was correlated with EF, mobility and affect (e.g., depressive symptoms). Much of the variance in the DTDs was unexplained. Usual-walking abilities and cognitive function contribute to the DT effects on gait, but these relationships depend on specifics of the DT, the gait feature being studied, and the particulars of the cognitive domain. Meeting the everyday challenges of walking while dual tasking apparently relies on multiple factors including a consistent gait pattern and EF.
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影响因子：
3.7
作者：
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通讯作者：
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作者：
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DOI：
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发表时间：
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影响因子：
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作者：
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通讯作者：
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DOI：
10.1093/gerona/62.8.844
发表时间：
2007-08-01
影响因子：
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作者：
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通讯作者：
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